Google just acquired DNNresearch, a spinoff company from the University of Toronto led by Geoffrey Hinton. The DNN in the company name stands for deep neural networks. As I have been learning from Professor Hinton’s online course, these are networks with multiple “hidden” layers of neurons. A hidden layer sits between an input and output layer. Hidden layers are responsible for much of the power of modern neural networks and the breakthroughs that have occurred are how to train these hidden l...